Touch display device and display panel

ABSTRACT

A touch display device and a display panel uniformly distributing capacitances between the touch lines and the touch electrodes are provided. The device includes a display panel in which a plurality of X-touch electrodes are electrically connected to form a X-touch electrode line and a plurality of X-touch electrode lines arranged in parallel to receive a plurality of touch driving signals, and a plurality of Y-touch electrode lines to transmit a plurality of touch sensing signals, and a touch driving circuit. A plurality of X-touch lines transmit the touch driving signals connect together the plurality of X-touch electrodes constituting a same X-touch electrode line through a plurality of contact holes. Distances between at least one Y-touch electrode line and the plurality of contact holes through which the plurality of X-touch lines are electrically connected to the X-touch electrodes adjacent to the at least one Y-touch electrode line are uniform.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Applications No.10-2021-0086943, filed on Jul. 2, 2021, which are hereby incorporated byreference for all purposes as if fully set forth herein.

BACKGROUND Technical Field

Embodiments of the present disclosure relate to a touch display deviceand a display panel, more specifically, a touch display device and adisplay panel in which touch lines are arranged such that capacitancesare uniformly distributed.

Description of the Related Art

With the development of the information society, there has been anincreasing demand for a variety of types of image display devices. Inthis regard, a range of display devices, such as liquid crystal displaydevice, electroluminescence display device, or quantum dot lightemitting display device have recently come into widespread use.

In order to provide more diverse functions, such a display deviceprovides a function of detecting a user’s finger touch or a pen touch ona display panel and performing a signal processing based on the detectedtouch data.

As an example, a touch display device capable of detecting a touchincludes a plurality of touch electrodes disposed or embedded in thedisplay panel, and may detect a presence of a user’s touch and touchcoordinates on the display panel by driving these touch electrodes.

Such a touch display device may be a mobile device such as a smart phoneand a tablet PC, as well as a large-screen touch display device such asa display for automobiles and exhibitions.

In a case of a touch display device having a large screen, a time delayfor transmitting the touch signal may be changed depending on positionsof the touch electrodes as the size of the display panel increases.

BRIEF SUMMARY

The inventors have realized that as a length of the touch lines totransmit the touch signal increases, parasitic capacitance due tocoupling between the touch lines and the touch electrodes increases,which may cause a problem in which touch sensitivity and touch sensingaccuracy may be degraded. Accordingly, to address one or more technicalproblems in the related art including the above-identified problem, theinventors of the present disclosure invented a touch display device anda display panel capable of improving touch sensitivity and touch sensingaccuracy by reducing a deviation for the time delay of the touch signaland uniformly distributing capacitances between the touch lines and thetouch electrodes.

The problems to be described below according to the embodiments of thepresent disclosure are not limited to the problems mentioned above, andother problems that are not mentioned will be clearly understood bythose skilled in the art from the following description.

A touch display device according to an embodiment of present disclosureincludes a display panel in which a plurality of X-touch electrodesarranged in a first direction are electrically connected to form aX-touch electrode line and a plurality of X-touch electrode lines arearranged in parallel to receive a plurality of touch driving signals,and a plurality of Y-touch electrode lines are extended in a seconddirection to transmit a plurality of touch sensing signals; and a touchdriving circuit for supplying the plurality of touch driving signals tothe plurality of X-touch electrode lines and for sensing a touch bydetecting the plurality of touch sensing signals from the plurality ofY-touch electrode lines, wherein a plurality of X-touch linestransmitting the plurality of touch driving signals are extended in thesecond direction and connect together the plurality of X-touchelectrodes constituting a same X-touch electrode line through aplurality of contact holes, and wherein distances between at least oneY-touch electrode line and the plurality of contact holes through whichthe plurality of X-touch lines are electrically connected to the X-touchelectrodes adjacent to the at least one Y-touch electrode line areuniform.

In the touch display device according to an embodiment of presentdisclosure, the plurality of X-touch electrode lines includes a shiftingarea in which remaining X-touch lines except for X-touch lines connectedthrough the plurality of contact holes are shifted at a selecteddistance (or at a predetermined distance for some embodiments).

In the touch display device according to an embodiment of presentdisclosure, the distance at which the remaining X-touch lines areshifted in the shifting area corresponds to an interval between adjacentX-touch lines.

In the touch display device according to an embodiment of presentdisclosure, a direction in which the remaining X-touch lines are shiftedin the shifting area is a horizontal direction towards an adjacentY-touch electrode line.

In the touch display device according to an embodiment of presentdisclosure, a direction in which the remaining X-touch lines are shiftedin the shifting region is a diagonal direction towards an adjacentY-touch electrode line.

In the touch display device according to an embodiment of presentdisclosure, at least one X-touch line among the remaining X-touch linesshifted in the shifting area has a different shifting point from otherX-touch lines.

In the touch display device according to an embodiment of presentdisclosure, a shifting point of an X-touch line adjacent to the Y-touchelectrode line is formed at a higher position than a shifting point ofother X-touch lines in the shifting area.

In the touch display device according to an embodiment of presentdisclosure, the shifting area is formed in an edge area that is far awayfrom the touch driving circuit in the X-touch electrode line.

In the touch display device according to an embodiment of presentdisclosure, the plurality of contact holes through which the pluralityof X-touch lines are electrically connected to the X-touch electrode areelectrically connected to a plurality of bridge lines connecting theX-touch electrode lines located on both sides of the Y-touch electrodeline.

In the touch display device according to an embodiment of presentdisclosure, an additional contact hole connected by the bridge line andan additional X-touch line electrically connected to the additionalcontact hole are formed at locations symmetrical with respect to theY-touch electrode line.

In the touch display device according to an embodiment of presentdisclosure, the plurality of contact holes through which the pluralityof X-touch lines are electrically connected to the X-touch electrode areformed in a corner area of the X-touch electrode adjacent to the Y-touchelectrode line.

In the touch display device according to an embodiment of presentdisclosure, the contact hole through which the plurality of X-touchlines are electrically connected to the X-touch electrode is formed at alocation opposite to a non-squared area when the display panel is anon-squared structure in which a touch electrode is not formed otherthan a squared structure.

In the touch display device according to an embodiment of presentdisclosure, at least one of the plurality of X-touch lines has a branchpoint to be branched into two X-touch lines, and same number of X-touchlines are arranged on both sides based on the branch point.

In the touch display device according to an embodiment of presentdisclosure, the branch point has a multi-level hierarchical structure,and five or less X-touch lines are connected on both sides based on afinal branch point.

In the touch display device according to an embodiment of presentdisclosure, the plurality of X-touch lines are extended from a pluralityof X-touch pads, and a loop structure is formed between the plurality ofX-touch pads and the plurality of X-touch electrodes.

In the touch display device according to an embodiment of presentdisclosure, the branch point of a plurality of Y-touch linestransmitting the touch sensing signal from the plurality of Y-touchelectrode lines is located within the loop structure of the X-touchline.

In the touch display device according to an embodiment of presentdisclosure, the X-touch electrode line is formed by X-touch electrodeswith same shapes on both sides of the first direction based on theY-touch electrode line.

In the touch display device according to an embodiment of presentdisclosure, the Y-touch electrode line is consisted of two bars andarranged in a split structure based on a first X-touch electrode, andthe X-touch electrode line is formed by second X-touch electrodes withsame shapes on both sides of the first direction based on the Y-touchelectrode line, and the first X-touch electrode.

In the touch display device according to an embodiment of presentdisclosure, a width of the first X-touch electrode line is smaller thana width of the second X-touch electrodes, or a width of the secondX-touch electrode lines is smaller than a width of the first X-touchelectrode.

A display panel according to an embodiment of present disclosureincludes a plurality of X-touch electrode lines arranged in parallel toreceive a plurality of touch driving signals in which a plurality ofX-touch electrodes arranged in a first direction are electricallyconnected to form a X-touch electrode line; a plurality of Y-touchelectrode lines extended in a second direction to transmit a pluralityof touch sensing signals; and a plurality of X-touch lines extending inthe second direction to connect together a plurality of X-touchelectrodes constituting a same X-touch electrode line through aplurality of contact holes and transmitting the plurality of touchdriving signals, wherein distances between at least one Y-touchelectrode line and the plurality of contact holes through which theplurality of X-touch lines are electrically connected to the X-touchelectrodes adjacent to the at least one Y-touch electrode line areuniform.

According to embodiments of the present disclosure, it is possible toprovide a touch display device and a display panel capable of improvingtouch sensitivity and touch sensing accuracy by reducing a deviation forthe time delay of the touch signal and uniformly distributingcapacitances between the touch lines and the touch electrodes.

The effects of the embodiments disclosed in the present disclosure arenot limited to the above mentioned effects. In addition, the embodimentsdisclosed in the present disclosure may cause another effect notmentioned above, which will be clearly understood by those skilled inthe art from the following description.

DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

In the accompanying drawings:

FIG. 1 illustrates a schematic diagram of a touch display deviceaccording to embodiments of the present disclosure.

FIG. 2 illustrates a structure in which a touch screen panel is embeddedin a display panel of a touch display device according to embodiments ofthe present disclosure.

FIG. 3 illustrates a structure of touch electrodes for touch sensingoperation based on mutual-capacitance in a touch display deviceaccording to embodiments of the present disclosure.

FIG. 4 illustrates a display panel with a multi-feeding structure inwhich a touch signal is simultaneously supplied to a plurality of touchelectrodes disposed at same line in a touch display device according toan embodiment of the present disclosure.

FIGS. 5A to 5D illustrate branching structures of a touch line forconnecting to a plurality of touch electrodes in a touch display deviceaccording to an embodiment of the present disclosure.

FIG. 6 illustrates a graph of a time delay for a touch signal dependingon the number of touch electrodes connected to same touch line based ona branch point in the touch display device according to an embodiment ofthe present disclosure.

FIG. 7 illustrates an example of an distance between a touch linereceiving a touch driving signal and a touch sensing electrode linetransmitting a touch sensing signal in a touch display device with amulti-feeding structure.

FIG. 8 illustrates an example of parasitic capacitance occurring in aY-touch electrode line in a touch display device with a multi-feedingstructure.

FIG. 9 illustrates a structure of touch lines in a touch display deviceaccording to an embodiment of the present disclosure.

FIG. 10 illustrates a touch line of a shifting area when the touchelectrode line is made of a mesh-type in the touch display deviceaccording to an embodiment of the present disclosure.

FIG. 11 illustrates a structure in which touch lines are shifted in adiagonal direction in a shifting area in the touch display deviceaccording to an embodiment of the present disclosure.

FIG. 12 illustrates an example of parasitic capacitance occurring in aY-touch electrode line in a touch display device according to anembodiment of the present disclosure.

FIGS. 13A, 13B, and 13C illustrate various structures of a touchelectrode line in a touch display device according to an embodiment ofthe present disclosure.

FIG. 14 illustrates a structure of touch electrode lines and touch linesformed on a non-squared display panel.

FIG. 15 illustrates a touch electrode lines and touch lines arranged ona non-squared display panel in a touch display device according to anembodiment of the present disclosure.

DETAILED DESCRIPTION

The advantages and features of the present disclosure and methods of therealization thereof will be apparent with reference to the accompanyingdrawings and detailed descriptions of the embodiments. The presentdisclosure should not be construed as being limited to the embodimentsset forth herein and may be embodied in a variety of different forms.Rather, these embodiments are provided so that the present disclosurewill be thorough and complete, and will fully convey the scope of thepresent disclosure to those having ordinary knowledge in the technicalfield.

The shapes, sizes, dimensions (e.g., length, width, height, thickness,radius, diameter, area, etc.), ratios, angles, number of elements, andthe like, inscribed in the drawings to illustrate embodiments areillustrative only, and the present disclosure is not limited to theembodiments illustrated in the drawings. Throughout this document, thesame reference numerals and symbols will be used to designate the sameor like components. In the following description of the presentdisclosure, detailed descriptions of known functions and componentsincorporated into the present disclosure will be omitted in thesituation in which the subject matter of the present disclosure may berendered unclear thereby. It will be understood that the terms“comprise,” “include,” “have,” and any variations thereof used hereinare intended to cover non-exclusive inclusions unless explicitlydescribed to the contrary. Descriptions of components in the singularform used herein are intended to include descriptions of components inthe plural form, unless explicitly described to the contrary.

In the analysis of a component, it shall be understood that an errorrange is included therein, even in the situation in which there is noexplicit description thereof.

When spatially relative terms, such as “on,” “above,” “under,” “below,”and “on a side of,” are used herein for descriptions of relationshipsbetween one element or component and another element or component, oneor more intervening elements or components may be present between theone and other elements or components, unless a term, such as “directly,”is used.

When temporally relative terms, such as “after,” “subsequent,”“following,” and “before” are used to define a temporal relationship, anon-continuous case may be included unless the term “immediately” or“directly” is used.

In descriptions of signal transmission, such as “a signal is sent fromnode A to node B,” a signal may be sent from node A to node B viaanother node unless the term “immediately” or “directly” is used.

In addition, terms, such as “first” and “second” may be used herein todescribe a variety of components. It should be understood, however, thatthese components are not limited by these terms. These terms are merelyused to discriminate one element or component from other elements orcomponents. Thus, a first component referred to as first hereinafter maybe a second component within the spirit of the present disclosure.

The features of embodiments of the present disclosure may be partiallyor entirely coupled or combined with each other and may work in concertwith each other or may operate in a variety of technical methods. Inaddition, respective embodiments may be carried out independently or maybe associated with and carried out in concert with other embodiments.

Hereinafter, a variety of embodiments will be described in detail withreference to the accompanying drawings.

FIG. 1 illustrates a schematic diagram of a touch display deviceaccording to embodiments of the present disclosure.

Referring to FIG. 1 the touch display device 100 according toembodiments of the present disclosure may include a display panel 110, agate driving circuit 120, a data driving circuit 130, a timingcontroller 140 and a touch driving circuit 150 to detect a touch on thedisplay panel 110.

A plurality of gate lines GL and a plurality of data lines DL aredisposed in the display panel 110, and a plurality of subpixels SP aredisposed in areas in which the gate lines GL overlaps the data lines DL.

In addition, a plurality of touch electrodes may be disposed on orwithin the display panel 110, and a plurality of touch lines TLelectrically connecting the touch electrodes and the touch drivingcircuit 150 may be disposed in the display panel 110.

A display driving operation in the touch display device 100 would bedescribed firstly, the gate driving circuit 120 controls the drivingtiming of the subpixels SP disposed in the display panel 110. Inaddition, the data driving circuit 130 supplies a data voltagecorresponding to image data to the subpixels SP. Accordingly, thesubpixels SP are displaying an image by illuminating a light havingluminous intensities corresponding to grayscale levels of the imagedata.

Specifically, the gate driving circuit 120 is controlled by the timingcontroller 140, and controls the driving timing of the plurality ofsubpixels SP by sequentially supplying scan signals to the plurality ofgate lines GL disposed in the display panel 110.

The gate driving circuit 120 may include one or more gate drivingintegrated circuits (GDIC), which may be disposed on one or both sidesof the display panel 110, depending on the driving scheme.Alternatively, the gate driving circuit 120 may be implemented with agate-in-panel (GIP) structure directly embedded in a bezel area of thedisplay panel 110.

The data driving circuit 130 receives digital image data from the timingcontroller 140, and converts the received digital image data into ananalog data voltage. In addition, the data driving circuit 130 suppliesthe data voltage to the respective data lines DL at time which the scansignals are supplied through the gate lines GL, so that the respectivesubpixels SP display luminous intensities according to the data voltage.

The data driving circuit 130 may include one or more source drivingintegrated circuits (SDICs).

The timing controller 140 supplies a variety of control signals to thegate driving circuit 120 and the data driving circuit 130, and controlsthe operations of the gate driving circuit 120 and the data drivingcircuit 130.

The timing controller 140 controls the gate driving circuit 120 tosupply the scan signals according to timing realized by respectiveframes, converts source image data received from an external source intoan image data DATA with a format readable by the data driving circuit130, and supplies the converted image data DATA to the data drivingcircuit 130.

The timing controller 140 also receives a variety of timing signals,including a vertical synchronization signal, a horizontalsynchronization signal, an input data enable signal, a clock signal, andthe like, as well as the image data DATA from the external source (e.g.,a host system).

The timing controller 140 may generate a data control signal DCS and agate control signal GCS using the variety of timing signals receivedfrom the external source, and supply the control signals DCS, GCS to thedata driving circuit 130 and the gate driving circuit 120, respectively.

For example, the timing controller 140 generates a variety of gatecontrol signals GCS, including a gate start pulse signal, a gate shiftclock signal, a gate output enable signal, and the like, to control thegate driving circuit 120.

Here, the gate start pulse signal is used to control the operation starttiming of one or more gate driving integrated circuits in the gatedriving circuit 120. The gate shift clock signal is a clock signalcommonly supplied to the one or more gate driving integrated circuits tocontrol the shift timing of the scan signals. The gate output enablesignal designates timing information of the one or more gate drivingintegrated circuits.

In addition, the timing controller 140 generates a variety of datacontrol signals DCS, including a source start pulse signal, a sourcesampling clock signal, a source output enable signal, and the like, tocontrol the data driving circuit 130.

Here, the source start pulse signal is used to control the data samplingstart timing of one or more source driving integrated circuits in thedata driving circuit 130. The source sampling clock signal is a clocksignal for controlling the sampling timing of data voltage in each ofthe source driving integrated circuits. The source output enable signalcontrols the output timing of the data driving circuit 130.

The touch display device 100 may further include a power managementintegrated circuit for supplying various types of voltage or current tothe display panel 110, the gate driving circuit 120, the data drivingcircuit 130, and the like, or controlling various types of voltage orcurrent to be supplied to the same.

The subpixels SP are defined adjacent to the overlapping locations ofthe gate lines GL and the data lines DL. Liquid crystals or lightemitting elements may be disposed in the subpixels SP, depending on thetype of the touch display device 100.

For example, in a case in which the touch display device 100 is a liquidcrystal display device, the touch display device 100 includes a lightsource device, such as a backlight unit, to illuminate the display panel110, and liquid crystals are disposed in the subpixels SP of the displaypanel 110. In addition, the touch display device 100 may displayluminous intensities and an image data by adjusting the alignment of theliquid crystals using electromagnetic fields generated in response tothe data voltage supplied to the subpixels SP.

In the case of a liquid crystal display device, the display panel 110includes a liquid crystal layer formed between two substrates, and itmay be operated in any known mode such as Twisted Nematic (TN) mode,Vertical Alignment (VA) mode, In Plane Switching (IPS) mode, or FringeField Switching (FFS) mode. On the other hand, in the case of anelectroluminescent display device, the display panel 110 may beimplemented in a top emission type, a bottom emission type, or a dualemission type.

In addition, the touch display device 100 according to embodiments ofthe present disclosure may detect a user’s touch on the display panel110 using the touch electrodes TE included in the display panel 110, andthe touch driving circuit 150.

FIG. 2 illustrates a structure in which a touch screen panel is embeddedin a display panel of a touch display device according to embodiments ofthe present disclosure.

Referring to FIG. 2 , a plurality of subpixels SP may be disposed on asubstrate SUB in an active area AA of the display panel 110 in the touchdisplay device 100 according to embodiments of the present disclosure.

Each subpixel SP may include a light emitting diode EL, a firsttransistor T1 for driving the light emitting diode EL, a secondtransistor T2 for transmitting a data voltage Vdata to a first node N1of the first transistor T1, and a storage capacitor Cst for maintaininga constant voltage for one frame.

The first transistor T1 may include a first node N1 to which a datavoltage Vdata may be supplied through the second transistor T2, a secondnode N2 electrically connected to the light emitting diode EL, and athird node N3 to which a driving voltage VDD is supplied from a drivingvoltage line DVL. The first node N1 may be a gate node, the second nodeN2 may be a source node or a drain node, and the third node N3 may be adrain node or a source node. The first transistor T1 may also bereferred to as a driving transistor for driving the light emitting diodeEL.

The light emitting diode EL may include a first electrode (e.g., ananode electrode), a light emitting layer, and a second electrode (e.g.,a cathode electrode). The first electrode may be electrically connectedto the second node N2 of the first transistor T1, and the secondelectrode may be supplied with a base voltage VSS.

The light emitting layer of the light emitting diode EL may be anorganic light emitting layer containing an organic material. In thiscase, the light emitting diode EL may be an organic light emittingdiode.

The second transistor T2 may be controlled to be turned on and off by ascan signal SCAN supplied through a gate line GL, and may beelectrically connected between the first node N1 of the first transistorT1 and the data line DL. The second transistor T2 may also be referredto as a switching transistor.

When the second transistor T2 is turned on by the scan signal SCAN, adata voltage Vdata supplied through the data line DL is transmitted tothe first node N1 of the first transistor T1.

The storage capacitor Cst may be electrically connected between thefirst node N1 and the second node N2 of the first transistor T1.

Each subpixel SP may have a 2T1C structure including two transistors T1,T2 and one capacitor Cst, and may further include one or moretransistors, or may further include one or more capacitors in somecases.

The storage capacitor Cst may be an external capacitor which isintentionally designed to be provided outside the first transistor T1,instead of a parasitic capacitor which is provided between the firstnode N1 and the second node N2 of the first transistor T1.

Each of the first transistor T1 and the second transistor T2 may be ann-type transistor or a p-type transistor.

On the other hand, circuit elements such as a light emitting diode EL,two or more transistors T1, T2, and one or more capacitors Cst, may bedisposed in the display panel 110. Since the circuit elements arevulnerable to external moisture or oxygen, an encapsulation layer ENCAPfor preventing external moisture or oxygen from penetrating into thecircuit elements may be disposed in the display panel 110.

The encapsulation layer ENCAP may be formed of one layer, but may alsobe formed of a plurality of layers. For example, when the encapsulationlayer ENCAP includes a plurality of layers, the encapsulation layerENCAP may include one or more inorganic encapsulation layers and one ormore organic encapsulation layers. As a specific example, theencapsulation layer ENCAP may include a first inorganic encapsulationlayer, an organic encapsulation layer, and a second inorganicencapsulation layer. Here, the organic encapsulation layer may belocated between the first inorganic encapsulation layer and the secondinorganic encapsulation layer. However, the configuration of theencapsulation layer ENCAP is not limited thereto.

The first inorganic encapsulation layer may be arranged on a secondelectrode (e.g., a cathode electrode) to be most adjacent to the lightemitting diode EL. The first inorganic encapsulation layer may be, forexample, made of an inorganic insulation material that can be depositedat a low temperature, such as silicon nitride (SiNx), silicon oxide(SiOx), silicon oxynitride (SiON), or aluminum oxide (Al₂O₃). Since thefirst inorganic encapsulation layer is deposited at a low temperature,the first inorganic encapsulation layer may prevent damage to the lightemitting layer (e.g., organic light emitting layer) that is vulnerableto a high temperature during a deposition process.

The organic encapsulation layer may be formed to have an area smallerthan the first inorganic encapsulation layer. In this case, the organicencapsulation layer may be formed to expose both ends of the firstinorganic encapsulation layer. The organic encapsulation layer may havea role of buffering stress between respective layers as a result ofbending of the touch display device 100, and may have a role ofenhancing the planarization performance. For example, the organicencapsulation layer may be made of an organic insulation material, suchas acrylic resin, epoxy resin, polyimide, polyethylene, or siliconoxycarbide (SiOC).

The second inorganic encapsulation layer may be formed on the organicencapsulation layer to cover the upper surface and side surface of eachof the organic encapsulation layer and the first inorganic encapsulationlayer. The second inorganic encapsulation layer reduces or blocksinfiltration of external moisture or oxygen into the first inorganicencapsulation layer and the organic encapsulation layer. For example,the second inorganic encapsulation layer may be made of an inorganicinsulation material such as silicon nitride (SiNx), silicon oxide(SiOx), silicon oxynitride (SiON), or aluminum oxide (Al₂O₃).

The touch screen panel TSP may be embedded in the display panel 110 bybeing disposed on the encapsulation layer ENCAP in the touch displaydevice 100 according to embodiments of the present disclosure. Forexample, a plurality of touch electrodes TE constituting the touchscreen panel TSP may construct the display panel 110 by being disposedon the encapsulation layer ENCAP in the touch display device 100.

The touch display device 100 may sense a touch based onmutual-capacitance scheme or a self-capacitance scheme, as a capacitancebased touch sensing scheme.

In case of a touch sensing scheme based on mutual-capacitance, aplurality of touch electrodes TE may be classified as touch drivingelectrodes which is supplied touch driving signals through touch drivinglines, and touch sensing electrodes which supplies touch sensing signalsthrough touch sensing lines and forms capacitances with the touchdriving electrodes. Here, the touch driving lines and the touch sensinglines may be referred to as touch lines. Also, the touch driving signalsand the touch sensing signals may be referred to as touch signals.

In case of the touch sensing scheme based on mutual-capacitance, thetouch presence and the touch coordinate may be detected based on achange of mutual-capacitance formed between the touch driving electrodeand the touch sensing electrode according to a presence of a pointersuch as a finger, a pen, or the like.

In case of the touch sensing scheme based on self-capacitance, eachtouch electrode serves as both the touch driving electrode and the touchsensing electrode. That is, a touch driving signal is supplied to atouch electrode TE through a touch line, and a touch sensing signalgenerated in the touch electrode, to which the touch driving signal issupplied, is transmitted through the same touch line. Accordingly, incase of the touch sensing scheme based on self-capacitance, there is nodistinction between the touch driving electrode and the touch sensingelectrode and no distinction between the touch driving line and thetouch sensing line.

In case of the touch sensing scheme based on self-capacitance, the touchpresence and a touch coordinate may be detected based on a change incapacitance formed between a pointer such as a finger, a pen, or thelike, and a touch electrode TE.

Thus, the touch display device 100 may sense a touch by the touchsensing scheme based on mutual-capacitance or the touch sensing schemebased on self-capacitance.

FIG. 3 illustrates a structure of touch electrodes for touch sensingoperation based on mutual-capacitance in a touch display deviceaccording to embodiments of the present disclosure.

Referring to FIG. 3 , the structure of touch electrodes for touchsensing operation based on mutual-capacitance in the touch displaydevice 100 according to embodiments of the present disclosure mayinclude a plurality of X-touch electrode lines X-TEL and a plurality ofY-touch electrode lines Y-TEL. Here, the plurality of X-touch electrodelines X-TEL and the plurality of Y-touch electrode lines Y-TEL may belocated on the encapsulation layer ENCAP.

A plurality of X-touch electrode lines X-TEL may be disposed in a firstdirection (e.g., X-axis), and a plurality of Y-touch electrode linesY-TEL may be disposed in a second direction (e.g., Y-axis) differentfrom the first direction.

In the present specification, the first direction and the seconddirection may be relatively different directions. For example, the firstdirection may be an X-axis direction and the second direction may be aY-axis direction. Conversely, the first direction may be the Y-axisdirection and the second direction may be the X-axis direction. Further,the first direction and the second direction may be orthogonal to eachother, but may not be orthogonal to each other. Also, rows and columnsin the present specification are relative, and the rows and columns maybe changed according to a viewing point of view.

Each of the plurality of X-touch electrode line X-TEL may be composed ofa plurality of electrically connected X-touch electrodes, and each ofthe plurality of Y-touch electrode line Y-TEL may be composed of aplurality of electrically connected Y-touch electrodes.

Here, the plurality of X-touch electrodes and the plurality of Y-touchelectrodes correspond to a plurality of touch electrodes TE havingdifferent roles (functions) respectively.

For example, the plurality of X-touch electrodes constituting theX-touch electrode line X-TEL may be touch driving electrodes, and theplurality of Y-touch electrodes constituting the Y-touch electrode lineY-TEL may be touch sensing electrodes. In this case, the plurality ofX-touch electrode lines X-TEL will correspond to a plurality of touchdriving electrode lines, and the plurality of Y-touch electrode linesY-TEL will correspond to a plurality of touch sensing electrode lines.

Conversely, the plurality of X-touch electrodes constituting theplurality of X-touch electrode lines X-TEL may be touch sensingelectrodes, and the plurality of Y-touch electrodes constituting theplurality of Y-touch electrode lines Y-TEL may be touch drivingelectrodes. In this case, the plurality of X-touch electrode lines X-TELwill correspond to a plurality of touch sensing electrode lines, and theplurality of Y-touch electrode lines Y-TEL will correspond to aplurality of touch driving electrode lines.

A touch sensor metal for touch sensing may include a plurality of touchlines TL in addition to the plurality of X-touch electrode lines X-TELand the plurality of Y-touch electrode lines Y-TEL.

The plurality of touch lines TL may include at least one X-touch lineX-TL connected to the plurality of X-touch electrode lines X-TEL, and atleast on Y-touch line Y-TL connected to the plurality of Y-touchelectrode lines Y-TEL.

This touch display device 100 may be used in mobile devices such assmartphones and tablet PCs, and may be used in large-screen displaydevices such as automobile displays and exhibition displays.

In particular, in the case of the large-screen touch display device 100,the length of the touch electrode line TEL formed of a plurality oftouch electrodes may be increased as the size of the display panel 110increases. Accordingly, a time delay in which a touch signal (a touchdriving signal or a touch sensing signal) is transmitted may increasedepending on positions of the touch electrode. As a result, theuniformity of the image displayed through the display panel 110 may bereduced.

In order to reduce the time delay of the touch signal, the touch linesmay be configured in a multi-feeding structure so that the touch signalmay be simultaneously supplied to a plurality of touch electrodesconstituting a same touch electrode line TEL.

FIG. 4 illustrates a display panel with a multi-feeding structure inwhich a touch signal is simultaneously supplied to a plurality of touchelectrodes disposed at same line in a touch display device according toan embodiment of the present disclosure.

Referring to FIG. 4 , the touch display device 100 according to anembodiment of the present disclosure may be configured in amulti-feeding structure so that a touch signal is simultaneouslysupplied to a plurality of touch electrodes constituting the same touchelectrode line TEL in order to reduce a time delay of a touch signal.

At this time, when a plurality of X-touch electrodes arranged in theX-axis direction constitute one X-touch electrode line X-TEL, theplurality of X-touch electrodes disposed at the same line may beconnected by a same X-touch line X-TL to supply a touch signalsimultaneously to the plurality of X-touch electrodes constituting aX-touch electrode line X-TEL.

Otherwise, when a plurality of Y-touch electrodes arranged in the Y-axisdirection constitute one Y-touch electrode line Y-TEL, the plurality ofY-touch electrodes disposed at the same line may be connected by a sameY-touch line Y-TL to supply a touch signal simultaneously to theplurality of Y-touch electrodes constituting a Y-touch electrode lineY-TEL.

Here, it has illustrated a case that the X-touch electrode line X-TEL inthe X-axis direction is composed of a plurality of X-touch electrodes,and the Y-touch electrode line Y-TEL in the Y-axis direction is composedof one Y-touch electrode, respectively. Accordingly, a plurality ofX-touch electrodes arranged in the same row in the X-axis direction maybe connected by the same X-touch line X-TL.

For example, the X-touch electrode line X-TEL1 in the first row may becomposed of a plurality of X-touch electrodes arranged in the first row,and a plurality of X-touch electrodes arranged in the first row may beelectrically connected to a branched first X-touch line X-TL1,respectively, so that the first touch signal may be simultaneouslytransmitted.

Accordingly, since the touch signal is simultaneously supplied to theplurality of X-touch electrodes arranged in the X-axis direction, thedelay of the touch signal for the plurality of X-touch electrodes isreduced, so that the touch performance may be uniform for the entirescreen of the display panel 110.

For example, when the plurality of X-touch electrodes arranged in theX-axis direction are touch driving electrodes, the plurality of X-touchelectrodes constituting one X-touch electrode line X-TEL areelectrically connected by the same X-touch line X-TL, and may receivethe same touch driving signal at the same time.

A plurality of X-touch electrode lines X-TEL1, ..., X-TELn may berespectively connected to corresponding X-touch pads X-TP throughrespective X-touch lines X-TL1, ..., X-TLn. For example, the pluralityof X-touch electrodes included in the first X-touch electrode lineX-TEL1 may be electrically connected to the corresponding X-touch padX-TP through the first X-touch line X-TL1.

On the other hand, since respective Y-touch electrode line Y-TEL1, ...,Y-TELm is composed of one Y-touch electrode, each Y-touch electrodelines Y-TEL1, ..., Y-TELm may be electrically connected to acorresponding Y-touch pad Y-TP through one Y-touch line Y-TL.

In this case, a structure for branching one touch line in order toconnect one touch line to a plurality of touch electrodes constitutingthe same touch electrode line TEL may be variously changed.

FIGS. 5A to 5D illustrate branching structures of a touch line forconnecting to a plurality of touch electrodes in a touch display deviceaccording to an embodiment of the present disclosure.

Here, it has illustrated a case in which one X-touch electrode lineX-TEL is composed of 20 X-touch electrodes X-TE arranged in the X-axisdirection as an example. Accordingly, the 20 X-touch electrodes X-TE arearranged in the same row of the X-axis direction, and may receive thesame touch signal since they are connected by the same X-touch lineX-TL. As a result, an X-touch line X-TL extending from one X-touch padX-TP are branched into 20 to be respectively connected 20 X-touchelectrodes X-TE constituting one X-touch electrode line X-TEL.

In this case, the position of the X-touch pad X-TP may be variouslyselected. In FIG. 5A, it has illustrated a cast that the X-touch padX-TP corresponds to the position of an X-touch electrode located at theleftmost from among the 20 X-touch electrodes X-TE. In this case, sincethe X-touch line X-TL extending from the X-touch pad X-TP may bebranched on the vertical extension line of the X-touch pad X-TP, thebranch point may correspond to the position of the first X-touchelectrode located at the leftmost among the 20 X-touch electrodes X-TE.Accordingly, in the case of FIG. 5A, the number of X-touch electrodesX-TE connected by the same X-touch line X-TL based on the branch pointmay be 20 on the right side.

On the other hand, FIG. 5B illustrates a case in which the X-touch padX-TP corresponds to the position of the center of the 20 X-touchelectrodes X-TE. In this case, since the X-touch line X-TL extendingfrom the X-touch pad X-TP may be branched on the vertical extension lineof the X-touch pad X-TP, the branch point is 20 may correspond to theposition of the center of the 20 X-touch electrodes X-TE. Therefore,when the branch point corresponds to the position of the center of theX-touch electrodes X-TE as shown in FIG. 5B, the number of X-touchelectrodes X-TE being connected by the same X-touch line X-TL based onthe branch point may be 10, which is ½ of the total number of 20,respectively, for the left and right sides of the branch point.

Alternatively, the branch point at which the X-touch line X-TL isdivided may be configured in a hierarchical structure with two or morelevels. FIG. 5C illustrates a case that the X-touch pad X-TP correspondsto the position of the center of the 20 X-touch electrodes X-TE, and thebranch point is formed in a two-level hierarchical structure.

In this case, since the X-touch line X-TL extending from the X-touch padX-TP may be branched first on the vertical extension line of the X-touchpad X-TP, the first branch point may correspond to the position of thecenter of the 20 X-touch electrodes X-TE. The two X-touch lines X-TLbranched at the first branch point may correspond to 10 X-touchelectrodes X-TE, respectively, and may be branched again at the secondbranch point. Accordingly, the X-touch line X-TL being branched at thesecond branch point may be respectively connected to five X-touchelectrodes X-TE for the left and right sides based on the second branchpoint.

As such, if the X-touch line X-TL extending from the X-touch pad X-TP isconfigured in a multi-level hierarchical structure, a time delay of atouch signal may be more effectively reduced since the number of theX-touch electrodes X-TE connected together based on the branch point isreduced.

On the other hand, when both the X-touch line X-TL and the Y-touch lineY-TL have a branched structure, sensitivity for touch sensing may bereduced because of a parasitic capacitance between the adjacent X-touchline X-TL and the Y-touch line Y -TL.

To solve the above problem, one of the X-touch line X-TL and the Y-touchline Y-TL may be formed in a loop shape. FIG. 5D illustrates a case inwhich the X-touch line X-TL is arranged in the loop shape between theX-touch pad X-TP and the X-touch electrode X-TE as an example.

Accordingly, the X-touch line X-TL may be respectively connected tocorresponding X-touch electrode X-TE by extending from a branch pointclose to the X-touch electrode X-TE in a structure with loop shape.

As described above, when the X-touch line X-TL is formed in a loop shapebetween the X-touch pad X-TP and the X-touch electrode X-TE, the effectof parasitic capacitance may be reduced by forming a space with acertain size in the X-touch line X-TL.

In addition, since the coupling between the Y-touch lines Y-TL may beuniformly formed by the X-touch line X-TL with a loop shape, thenon-uniformity effect caused by the parasitic capacitance may bereduced.

In addition, since the branch point of the X-touch line X-TL extendingfrom the X-touch line X-TL with a loop shape to the X-touch electrodeX-TE may be located at a position close to the X-touch electrode X-TE,the signal delay of the touch driving signal may be reduced.

On the other hand, when the X-touch line X-TL is formed in a loop shapebetween the X-touch pad X-TP and the X-touch electrode X-TE, the Y-touchline Y- TL may be formed in the branch structure of FIGS. 5A to 5C, andthe branch point is disposed within the loop structure of the X-touchline X-TL.

FIG. 6 illustrates a graph of a time delay for a touch signal dependingon the number of touch electrodes connected to same touch line based ona branch point in the touch display device according to an embodiment ofthe present disclosure.

Referring to FIG. 6 , it can be seen that the time delay for the touchsignal is reduced as the number of touch electrodes TE connected to thesame touch line TL based on the branch point decreases in the touchdisplay device according to an embodiment of the present disclosure.

For example, the time delay for the touch signal is reduced when thenumber of X-touch electrodes X-TE connected to the same X-touch lineX-TL based on the branch point is 10 (in the case of FIG. 5B) comparingthat the number of X-touch electrodes X-TE connected to the same X-touchline X-TL based on a branch point is 20 (in the case of FIG. 5A). Inaddition, the time delay for the touch signal may be further reducedwhen the number of X-touch electrodes X-TE connected to the same X-touchline X-TL based on the second branch point using a multi-levelhierarchical structure is 5 (in the case of FIG. 5C).

It can be seen that this reduction of time delay is proportional to thenumber of touch electrodes X-TE connected to the same X-touch line X-TLbased on the branch point, even when the total resistance of the X-touchline X-TL increases.

Therefore, when a plurality of X-touch electrodes X-TE arranged in theX-axis direction constitute one X-touch electrode line X-TEL, the timedelay for the touch signal may be reduced by forming the branch point inthe multi-level hierarchical structure and reducing the number ofX-touch electrodes X-TE connected to the same X-touch line X-TL based onthe branch point.

On the other hand, when the touch line TL is formed in a multi-feedingstructure in order to simultaneously supply a touch driving signal to aplurality of touch driving electrodes constituting the touch drivingelectrode line (e.g., X-TEL), parasitic capacitance may be induced dueto a distance between the touch driving line (e.g., X-TL) supplying thetouch driving signal and the touch sensing electrode line (e.g., Y-TEL)transmitting the touch sensing signal, which leads to a decrease intouch performance.

FIG. 7 illustrates an example of a distance between a touch linereceiving a touch driving signal and a touch sensing electrode linetransmitting a touch sensing signal in a touch display device with amulti-feeding structure.

Here, it illustrates a structure that the X-touch electrode linesX-TEL1, ..., X-TELn in the X-axis direction is composed of a pluralityof X-touch electrodes corresponding to the touch driving electrodes, andthe Y-touch electrode line Y-TEL in the Y-axis direction is composed ofone Y-touch electrode corresponding to the touch sensing electrode.Accordingly, a plurality of X-touch electrodes arranged in the same rowof the X-axis direction may be connected to the same X-touch line X-TL.

At this time, a touch driving signal may be supplied to the firstX-touch electrode line X-TEL1 located at first row through the firstX-touch line X-TL1, and a touch driving signal may be supplied to thesecond X-touch electrode line X-TEL2 located at second row through thesecond X-touch line X-TL2. Similarly, a touch driving signal may besupplied to the (n-1)th X-touch electrode line X-TELn-1 located at(n-1)th row through the (n-1)th X-touch line X-TLn-1, and a touchdriving signal may be supplied to the nth X-touch electrode line X-TELnlocated at nth row through the nth X-touch line X-TLn.

In this structure, when the X-touch line X-TL is arranged in a straightline, the distances D1, ..., Dn between the Y-touch electrode line Y-TELcorresponding to the touch sensing electrode and the X-touch line X-TLare different for each location of the X-touch electrode line X-TEL dueto the location of the contact hole CNT where the X-touch line X-TL andthe X-touch electrode line X-TEL are connected.

In the case of FIG. 7 , based on the Y-touch electrode line Y-TEL, thefirst distance D1 between the first X-touch line X-TL1 electricallyconnected to the first X-touch electrode line X-TEL1 and the Y-touchelectrode line Y-TEL, the second distance D2 between the second X-touchline X-TL2 electrically connected to the second X-touch electrode lineX-TEL2 and the Y-touch electrode line Y-TEL, the (n-1)th distance Dn-1between the (n-1)th X-touch line X-TLn-1 electrically connected to(n-1)th X-touch electrode line X-TELn-1 and the Y-touch electrode lineY-TEL, and the nth distance Dn between the nth X-touch line X-TLnelectrically connected to the nth X-touch electrode line X-TELn and theY-touch electrode line Y-TEL may be different.

For this reason, even if a touch occurs at the X-touch electrode at aspecific location, it may cause parasitic capacitance due to anotherX-touch line X-TL passing through the X-touch electrode at a specificlocation. Accordingly, touch performance may be degraded due to adeviation in parasitic capacitance from a difference in distance fromthe Y-touch electrode line Y-TEL.

This phenomenon may be especially increased in the case of multi-touchin which a plurality of fingers simultaneously touch a plurality ofX-touch electrodes.

FIG. 8 illustrates an example of parasitic capacitance occurring in aY-touch electrode line in a touch display device with a multi-feedingstructure.

Referring to FIG. 8 , the X-touch electrode line X-TEL corresponding tothe touch driving electrode is uniformly arranged around the Y-touchelectrode line Y-TEL corresponding to the touch sensing electrode in thetouch display device 100 with a multi-feeding structure. Accordingly,the parasitic capacitance Cm formed between the X-touch electrode lineX-TEL and the Y-touch electrode line Y-TEL may have a uniformdistribution.

On the other hand, the distances D1, ..., Dn between the Y-touchelectrode line Y-TEL and the X-touch line X-TL are different for eachlocation of the X-touch electrode line X-TEL due to the location of thecontact hole where the X-touch line X-TL and the X-touch electrode lineX-TEL are connected. Accordingly, the parasitic capacitance Cm formedbetween the X-touch line X-TL and the Y-touch electrode line Y-TEL mayhave a non-uniform distribution.

In particular, since a greater number of X-touch lines X-TL may bearranged at a location closer to the touch driving circuit 150, theparasitic capacitance Cm formed between the X-touch line X-TL and theY-touch electrode line Y-TEL may increase as the location closer to thetouch driving circuit 150.

For this reason, in the case that the touch line TL is formed in amulti-feeding structure in order to simultaneously supply a touchdriving signal to a plurality of touch driving electrodes constitutingthe X-touch electrode line X-TEL, touch performance may be degraded andit may be difficult to determine an accurate touch position due to theparasitic capacitance Cm formed between the X-touch line X-TL and theY-touch electrode line Y-TEL.

In order to solve the above problem, it may uniformly form the distancesD1, ..., Dn between the Y-touch electrode line Y-TEL corresponding totouch sensing electrodes and the X-touch line X-TL corresponding to thetouch driving line to reduce the deviation of the parasitic capacitanceCm formed between the X-touch line X-TL and the Y-touch electrode lineY-TEL.

FIG. 9 illustrates a structure of touch lines in a touch display deviceaccording to an embodiment of the present disclosure.

Referring to FIG. 9 , the display panel 110 in the touch display device100 according to an embodiment of the present disclosure may include anX-touch electrode line X-TEL composed of a plurality of X-touchelectrodes arranged in the X-axis direction to simultaneously receivethe touch driving signal, a Y-touch electrode line Y-TEL arranged in theY-axis direction to transmit a touch sensing signal, and a plurality ofX-touch lines X-TL that are arranged in the Y-axis direction andelectrically connected to a designated X-touch electrode X-TE totransmit a touch driving signal through a contact hole CNT, wherein theplurality of X-touch lines X-TL may be arranged to have uniformdistances D between the contact hole CNT connected to the X-touchelectrode X-TE and the adjacent Y-touch electrode line Y-TEL.

For example, the 20th X-touch line X-TL20 among the plurality of X-touchlines X-TL closest to the Y-touch electrode line Y-TEL may beelectrically connected to the 20th X-touch electrode line X-TEL20through a contact hole CNT at a point spaced apart from the Y-touchelectrode line Y-TEL by a selected distance (or at a predetermineddistance) D. Accordingly, the distance between the 20th X-touch lineX-TL20 connected to the 20th X-touch electrode line X-TEL20 and theY-touch electrode line Y-TEL may be D.

Since the 20th X-touch line X-TL20 is electrically connected to the 20thX-touch electrode line X-TEL20 through the contact hole CNT, the 20thX-touch line X-TL20 is extended only to the shifting area and is not beextended to the upper area beyond the 20th X-touch electrode lineX-TEL20.

On the other hand, the first X-touch line X-TL1 to the 19th X-touch lineX-TL19 may be arranged to be shifted in the direction of the Y-touchelectrode line Y-TEL by a selected distance (or at a predetermineddistance) from the shifting area of the 20th X-touch electrode lineX-TEL20.

At this time, the distance at which the 19th X-touch line X-TL19 isshifted in the shifting area may correspond to the interval between the19th X-touch line X-TL19 and the 20th X-touch line X-TL20. As a result,the position at which the 19th X-touch line X-TL19 is shifted in theshifting area corresponds to a point where the distance from the Y-touchelectrode line Y-TEL is D. Additionally, the point where the 19thX-touch line X-TL19 is connected to the 19th X-touch electrode lineX-TEL19 corresponds to a point where the distance from the Y-touchelectrode line Y-TEL is D same as the 20th X-touch line X-TL20.

Similarly, the 19th X-touch line X-TL19 may be extended only to theshifting area of the 19th X-touch electrode line X-TEL19 and is not beextended to the upper area beyond the 19th X-touch electrode lineX-TEL19.

On the other hand, the first X-touch line X-TL1 to the 18th X-touch lineX-TL18 may be arranged to be shifted in the direction of the Y-touchelectrode line Y-TEL by a selected distance (or at a predetermineddistance) from the shifting area of the 19th X-touch electrode lineX-TEL19. As a result, the point where the 18th X-touch line X-TL18 isconnected to the 18th X-touch electrode line X-TEL18 may be the pointwhere the distance from the Y-touch electrode line Y-TEL is D.

As described above, the point where each X-touch line X-TL iselectrically connected to the X-touch electrode line X-TEL through thecontact hole CNT may be arranged to have a uniform distance D from theY-touch electrode line Y-TEL by shifting the remaining X-touch linesX-TL except for the X-touch line X-TL connected to the X-touch electrodeline X-TEL in the shifting area.

At this time, the shifting area in which the X-touch line X-TL isarranged in a shifting structure may correspond to an edge area of theX-touch electrode line X-TEL in order for uniform arrangement withrespect to the Y-touch electrode line Y-TEL. For example, when the touchdriving circuit 150 is located at lower area of the display panel 110,the shifting area in which the X-touch line X-TL is arranged in ashifting structure may correspond to an upper edge area of the X-touchelectrode line X-TEL since the X-touch line X-TL extends from the lowerside to the upper side of the display panel 110.

Also, the X-touch electrode lines X-TEL located on both sides of theY-touch electrode line Y-TEL may be connected through the bridge lineBL. At this time, the point where the bridge line BL is connected maycorrespond to the contact hole CNT where the X-touch line X-TL iselectrically connected to the X-touch electrode line X-TEL. In thiscase, the bridge line BL connecting the X-touch electrode lines X-TELlocated on both sides of the Y-touch electrode line Y-TEL and theX-touch line X-TL electrically connected to the X-touch electrode lineX-TEL may be connected by one contact hole CNT.

At this time, the contact hole CNT in which the X-touch line X-TL iselectrically connected to the X-touch electrode line X-TEL may be formedin a corner area of the X-touch electrode X-TE adjacent to the Y-touchelectrode line Y-TEL in order to reduce a parasitic capacitance with theY-touch electrode line Y-TEL.

In addition, it is beneficial to form the X-touch lines X-TL so as toform a symmetrical structure with respect to the Y-touch electrode lineY-TEL based on the contact hole CNT connected by the bridge line BL foruniform arrangement of the Y-touch electrode line Y-TEL. Here, itillustrates a case in which a touch line with a structure symmetrical tothe 20th X-touch line X-TL20 is formed on the right side of the Y-touchelectrode line Y-TEL by being connected to the bridge line BL in orderto form a symmetrical structure with the 20th X-touch line X-TL20located on the left side of the Y-touch electrode line Y-TEL.

On the other hand, the touch electrode lines X-TEL, Y-TEL in the touchdisplay device 100 may be of a plate-type without an opening, or may beof a mesh-type with openings for emitting efficiency of subpixels.

FIG. 10 illustrates an touch line of a shifting area when the touchelectrode line is made of a mesh-type in the touch display deviceaccording to an embodiment of the present disclosure.

Referring to FIG. 10 , the X-touch electrode line X-TEL receiving atouch driving signal and the Y-touch electrode line Y-TEL transmitting atouch sensing signal in the touch display device 100 according to anembodiment of the present disclosure may be formed of a mesh-type withopenings.

In this case, the touch electrode lines X-TEL, Y-TEL may extend in astructure in which openings are formed in the center and the touchelectrode metal surrounding the openings is repeated. Here, it hasillustrated a case in which the touch electrode metal surrounding theopenings is formed in an octagonal shape as an example. It could also bea hexagon or other polygon.

At this time, the X-touch line X-TL for supplying the touch drivingsignal extends along the octagonal touch electrode metal constitutingthe X-touch electrode line X-TEL, and certain X-touch line X-TL may beelectrically connected to the corresponding X-touch electrode line X-TELthrough the contact hole CNT at a position spaced apart from the Y-touchelectrode line Y-TEL by a uniform distance D.

On the other hand, the touch electrode lines X-TEL, Y-TEL may be made ofa transparent electrode or may include a transparent electrode for theemitting efficiency of the subpixel SP.

At this time, the distances D1, ..., Dn between the Y-touch electrodeline Y-TEL corresponding to the touch sensing electrode and the X-touchline X-TL corresponding to the touch driving line may be uniformlyformed. However, the shifting direction of the X-touch line X-TL in theshifting area may be a horizontal direction or a diagonal direction.

FIG. 11 illustrates an structure in which touch lines are shifted in adiagonal direction in a shifting area in the touch display deviceaccording to an embodiment of the present disclosure.

Referring to FIG. 11 , when the X-touch lines X-TL are shifted in thehorizontal direction in the shifting area in the touch display device100 according to an embodiment of the present disclosure in order touniformly form the distances D1, ..., Dn between the Y-touch electrodeline Y-TEL and the X-touch lines X-TL, they may electrically contact tothe neighboring X-touch lines X-TL.

Therefore, the X-touch lines X-TL may be formed to be shifted in adiagonal direction in the shifting area in order to prevent the X-touchlines X-TL shifted in the shifting area from electrically contacting theadjacent X-touch lines X-TL and secure a stable separation distance.

Also, at least one X-touch line X-TL shifted in a diagonal direction ina shifting area may have a different shifting point according to alocation.

For example, when 20 X-touch lines X-TL1 ~ X-TL20 are disposed betweenthe Y-touch electrode lines Y-TEL, and the X-touch line X-TL is shiftedto the upper right in the diagonal direction, the X-touch line X-TL doesnot exist on the left side of the first X-touch line X-TL1. Accordingly,the first X-touch line X-TL1 may have the highest shifting point.

On the other hand, since the second X-touch line X-TL2 to the 19thX-touch line X-TL19 have each X-touch line X-TL on the left side, theshifting point of the second X-touch line X-TL2 to the 19th X-touch lineX-TL19 may be formed in a positon lower than the shifting point of the1st X-touch line X-TL1.

On the other hand, since the 20th X-touch line X-TL20 has a symmetricalrelationship with the 1st X-touch line X-TL1, it may have a shiftingpoint at the same location as the 1st X-touch line X-TL1.

Here, it has illustrated a case that the position of the shifting pointfor at least one of the X-touch lines X-TL is differently located whenthe X-touch lines X-TL are shifted in the diagonal direction in theshifting area.

FIG. 12 illustrates an example of parasitic capacitance occurring in aY-touch electrode line in a touch display device according to anembodiment of the present disclosure.

Referring to FIG. 12 , the touch display device 100 according to anembodiment of the present disclosure may have a uniform parasiticcapacitance Cm formed between the X-touch electrode line X-TEL and theY-touch electrode line Y-TEL since the X-touch electrode line X-TELcorresponding to the touch driving electrode are uniformly arrangedaround the Y-touch electrode line Y-TEL corresponding to the touchsensing electrode.

In addition, a point where each X-touch line X-TL is electricallyconnected to the X-touch electrode line X-TEL through the contact holeCNT may be arranged to have a uniform distance from the Y-touchelectrode line Y-TEL by shifting the remaining X-touch lines except forthe X-touch line X-TL connected to the X-touch electrode line X-TEL inthe shifting area. Accordingly, the parasitic capacitance Cm formedbetween the X-touch line X-TL and the Y-touch electrode line Y-TEL mayalso be formed with a uniform distribution.

As a result, even though the touch lines TL are arranged in amulti-feeding structure in order to simultaneously supply a touchdriving signal to a plurality of touch driving electrodes constitutingthe X-touch electrode line X-TEL, the touch display device 100 accordingto the present disclosure may maintain excellent touch performance dueto a uniform capacitance formed between the X-touch lines X-TL and theY-touch electrode line Y-TEL.

FIGS. 13A, 13B, 13C illustrate various structures of a touch electrodeline in a touch display device according to an embodiment of the presentdisclosure.

Referring to FIGS. 13A, 13B, 13C, the touch display device 100 accordingto an embodiment of the present disclosure may be formed of touchelectrode lines X-TEL, Y-TEL with various structures.

For example, an X-touch electrode line X-TEL may be formed by X-touchelectrodes X-TE with same shapes on both sides of the X-axis directionbased on the Y-touch electrode line Y-TEL with a single bar structureextending in the Y-axis direction (as shown in FIG. 13A).

Alternatively, a Y-touch electrode line Y-TEL consisting of two bars maybe arranged in a split structure based on an X-touch electrode X-TE witha thin structure, and an X-touch electrode line X-TEL may be formed byX-touch electrodes X-TE with same shapes on both sides of the X-axisdirection based on the Y-touch electrode line Y-TEL with two barstructure, and the X-touch electrode X-TE with a thin structure (asshown in FIG. 13B).

Alternatively, it may have a structure in which the width of the X-touchelectrode lines X-TEL located on both outsides of the Y-touch electrodelines Y-TEL consisting of two bars is smaller than the width of theX-touch electrode line X-TEL located between the Y-touch electrode linesY-TEL consisting of two bars (as shown in FIG. 13C).

In this case, the X-touch electrode lines X-TEL separated by the Y-touchelectrode line Y-TEL may be connected to each other through the bridgeline BL.

The structure of these touch electrode lines X-TEL, Y-TEL may bevariously amended according to the size or use of the touch displaydevice 100.

On the other hand, the contact hole CNT through which the X-touch lineX-TL is electrically connected to the X- touch electrode line X-TEL maybe formed in a certain distance D spaced apart from the Y-touchelectrode line Y-TEL. It may be effectively determined according to theshape of the display panel 110.

On the other hand, recently, as the touch display device 100 is used asa display device in various fields such as a watch or a vehicleinstrument panel, a non-squared display screen is beneficial (suchshapes may include a circle-shaped display panel, a rounded-edge shapedisplay panel, a polygonal-shaped display panel, or the like).Accordingly, the display panel 100 may be made of a structure such as acircle rather than a square.

FIG. 14 illustrates a structure of touch electrode lines and touch linesformed on a non-squared display panel.

Referring to FIG. 14 , when the display panel 110 of the touch displaydevice 100 is formed of a non-squared display panel 110 such as acircular display panel 110, a non-squared area in which a contact holeCNT for electrically connecting to the X-touch line TL cannot be locatedmay be formed in an outside of the active area for displaying an image.

For example, when the non-squared area in which the touch electrode isnot formed is located in the upper left side of the display panel 110, acontact hole CNT for connecting to the X-touch line X-TL may not beformed in the X-touch electrode line X-TEL1 located in the upper leftedge area based on the central portion of the active area in the displaypanel 110.

Conversely, when the non-squared area in which the touch electrode isnot formed is located in the upper right side of the display panel 110,a contact hole CNT for connecting to the X-touch line X-TL may not beformed in the X-touch electrode line X-TEL1 located in the upper rightedge area based on the central portion of the active area in the displaypanel 110.

Therefore, a voltage deviation may occur between the touch area to whichthe touch driving signal is supplied and the area to which the touchdriving signal is not supplied through the X-touch line X-TL, and as aresult, a vertical line may occur due to luminance deviation.Accordingly, the luminance deviation may be occurred at the edge line ofthe active area since the touch lines X-TL and the contact holes CNT arenot uniformly formed in an area adjacent to the edge area of the activearea in the circular display panel 110.

Accordingly, it is beneficial to arrange a position of the contact holesCNT for connecting the X-touch lines X-TL supplying the touch drivingsignal with the X-touch electrode line X-TEL at a position opposite tothe non-squared area in order to form a contact hole CNT for connectingthe X-touch lines X-TL to the X-touch electrode line X-TEL.

FIG. 15 illustrates a touch electrode lines and touch lines arranged ona non-squared display panel in a touch display device according to anembodiment of the present disclosure.

Referring to FIG. 15 , when the non-squared area in which the touchelectrodes are not formed is located on the upper left side of thedisplay panel 110, a contact hole CNT for connecting the X-touchelectrode line X-TEL1 to the X-touch line X-TL may be located in thelower right side.

As a result, it may reduce the area in which the contact hole CNT forconnecting the X-touch electrode line X-TEL1 to the X-touch line X-TL isnot formed, and it may improve the touch performance at the edge area.

On the other hand, when the non-squared area in which the touchelectrodes are not formed is located on the upper right side of thedisplay panel 110, a contact hole CNT for connecting the X-touchelectrode line X-TEL1 to the X-touch line X-TL may be located in thelower left side.

The above description and the accompanying drawings provide an exampleof the technical idea of the present disclosure for illustrativepurposes only. Those having ordinary knowledge in the technical field,to which the present disclosure pertains, will appreciate that variousmodifications and changes in form, such as combination, separation,substitution, and change of a configuration, are possible withoutdeparting from the essential features of the present disclosure.Therefore, the embodiments disclosed in the present disclosure areintended to illustrate the scope of the technical idea of the presentdisclosure, and the scope of the present disclosure is not limited bythe embodiment. The scope of the present disclosure shall be construedon the basis of the accompanying claims in such a manner that all of thetechnical ideas included within the scope equivalent to the claimsbelong to the present disclosure.

The various embodiments described above can be combined to providefurther embodiments. All of the U.S. patents, U.S. patent applicationpublications, U.S. patent applications, foreign patents, foreign patentapplications and non-patent publications referred to in thisspecification and/or listed in the Application Data Sheet areincorporated herein by reference, in their entirety. Aspects of theembodiments can be modified, if necessary to employ concepts of thevarious patents, applications and publications to provide yet furtherembodiments.

These and other changes can be made to the embodiments in light of theabove-detailed description. In general, in the following claims, theterms used should not be construed to limit the claims to the specificembodiments disclosed in the specification and the claims, but should beconstrued to include all possible embodiments along with the full scopeof equivalents to which such claims are entitled. Accordingly, theclaims are not limited by the disclosure.

1. A touch display device comprising: a display panel including: asubstrate with a plurality of subpixels, an encapsulation layer disposedon the substrate, and a touch screen panel disposed on the encapsulationlayer, the touch screen panel including: a plurality of touch drivingelectrodes receiving touch driving signals through a plurality of touchdriving lines, and a plurality of touch sensing electrodes formingcapacitances with the plurality of touch driving electrodes andsupplying touch sensing signals through a plurality of touch sensinglines; and a touch driving circuit for supplying the plurality of touchdriving signals to the plurality of touch driving lines and for sensinga touch by detecting the plurality of touch sensing signals from theplurality of touch sensing lines; wherein the plurality of touch drivinglines and the plurality of touch sensing lines are formed in a mesh-typeshape having openings.
 2. The touch display device according to claim 1,wherein the mesh-type shape having openings are repeated in a structurewith the openings formed in a center and touch electrode metalssurrounding the openings.
 3. The touch display device according to claim1, wherein the touch electrode metals surrounding the openings form apolygon type opening in the general shape of an octagon.
 4. The touchdisplay device of claim 3, wherein the plurality of touch driving linesare extended along the octagonal-like shaped touch electrode metalsconstituting the plurality of touch driving lines, and each of theplurality of touch sensing lines is electrically connected to thecorresponding touch driving line through a contact hole.
 5. The touchdisplay device of claim 4, wherein distances between a plurality ofcontact holes coupled to the plurality of touch driving lines andadjacent the plurality of touch sensing lines are uniformly formed. 6.The touch display device of claim 1, wherein the plurality of touchdriving lines and the plurality of touch sensing lines are made of atransparent electrode for the emitting efficiency of the subpixel. 7.The touch display device of claim 1, wherein the plurality of touchdriving lines and the plurality of touch sensing lines include atransparent electrode for the emitting efficiency of the subpixel. 8.The touch display device of claim 1, wherein at least some of theplurality of touch driving lines includes a shifting area shifted at aselected distance.
 9. The touch display device of claim 8, wherein ashifting direction of the plurality of touch driving lines in theshifting area is a horizontal direction or a diagonal direction.
 10. Thetouch display device of claim 1, wherein the display panel is anon-squared display panel, and a non-squared area in which a pluralityof contact holes for electrically connecting to the plurality of touchdriving lines are not located in an outside of an active area fordisplaying an image.
 11. The touch display device of claim 1, whereinthe non-squared display panel includes a circular display panel.
 12. Thetouch display device of claim 10, wherein the plurality of contact holeselectrically connected to the plurality of touch driving lines areformed at a location opposite to the non-squared area.
 13. A displaypanel comprising: a substrate including a plurality of subpixels; anencapsulation layer disposed on the substrate; and a touch screen paneldisposed on the encapsulation layer, the touch screen panel including aplurality of touch electrodes; wherein the plurality of touch electrodesincludes: a plurality of touch driving electrodes receiving touchdriving signals through a plurality of touch driving lines; and aplurality of touch sensing electrodes forming capacitances with theplurality of touch driving electrodes and supplying touch sensingsignals through a plurality of touch sensing lines; and wherein theplurality of touch driving lines and the plurality of touch sensinglines are formed in a mesh-type shape having openings.
 14. The touchdisplay device according to claim 13, wherein the mesh-type shape havingopenings are repeated in a structure with the openings formed in acenter and touch electrode metals surrounding the openings.
 15. Thetouch display device according to claim 14, wherein the touch electrodemetals surrounding the openings are curved to form a polygonal-likeshape around the opening.
 16. The touch display device of claim 14,wherein the plurality of touch driving lines are extended along thepolygonal-like shaped touch electrode metals constituting the pluralityof touch driving lines, and each of the plurality of touch sensing linesis electrically connected to the corresponding touch driving linethrough a contact hole.
 17. The touch display device of claim 16,wherein distances between a plurality of contact holes coupled to theplurality of touch driving lines and adjacent the plurality of touchsensing lines are constant.
 18. The touch display device of claim 13,wherein the plurality of touch driving lines and the plurality of touchsensing lines are made of a transparent electrode for the emittingefficiency of the subpixel.
 19. The touch display device of claim 13,wherein at least some of the plurality of touch driving lines includes ashifting area shifted at a selected distance.
 20. The touch displaydevice of claim 19, wherein a shifting direction of the plurality oftouch driving lines in the shifting area is a horizontal direction or adiagonal direction.